CN217774157U - Nickel sulfate solution deironing device, deironing system - Google Patents
Nickel sulfate solution deironing device, deironing system Download PDFInfo
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- CN217774157U CN217774157U CN202221571123.7U CN202221571123U CN217774157U CN 217774157 U CN217774157 U CN 217774157U CN 202221571123 U CN202221571123 U CN 202221571123U CN 217774157 U CN217774157 U CN 217774157U
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Abstract
The utility model relates to a nickel sulfate deironing technical field, concretely relates to nickel sulfate solution deironing device, deironing system, the device include the resin tower, nickel sulfate storage tank, acid water storage tank, alkaline water storage tank, regeneration water storage tank, first discharging pipe, second discharging pipe, acid water outlet pipe, alkaline water outlet pipe, regeneration water outlet pipe and iron on-line analyzer, this system includes total control system, at least two sets of branch control system and at least two sets of nickel sulfate solution deironing device, the utility model discloses a method adopts D860 aminophosphate ion exchange resin to carry out the deironing as deironing resin to nickel sulfate solution. The utility model discloses a contain resin tower and several liquid storage tower in the device, it has the ion exchange resin who is used for deironing iron to fill in the resin tower, compares in the equipment of precipitation method and extraction, and this equipment area is little, and equipment operation and investment cost are few, and the treatment effect is stable, and it is few to produce useless volume.
Description
Technical Field
The utility model relates to a nickel sulfate deironing technical field, concretely relates to nickel sulfate solution deironing device, deironing system.
Background
The prior iron removal technology in nickel sulfate mainly comprises two methods, namely a precipitation method and an extraction method. The precipitation method is to add an oxidant to oxidize ferrous iron into ferric iron, and then add liquid caustic soda to carry out precipitation and iron removal, and the problem that a large amount of nickel is precipitated together during the precipitation and iron removal, so that the production cost is increased, the medicament consumption is high, a large amount of tailings are generated to be treated, and meanwhile, the treatment effect is unstable and is less adopted at present. The extraction method adopts an extractant for extraction to realize nickel-iron separation, can obtain good effect, and has the defects that an extraction box needs to occupy a large land area, the investment cost is high, a large amount of waste extractant and waste solvent oil are generated at the same time, the waste extractant and the waste solvent oil are both dangerous wastes, and need to be treated by qualified units, and the subsequent treatment cost is high.
SUMMERY OF THE UTILITY MODEL
To the problem that prior art exists, the utility model discloses a nickel sulfate solution deironing device, deironing system specifically includes following content:
a nickel sulfate solution iron removal device comprises a resin tower, a nickel sulfate storage tank, an acidic water storage tank, an alkaline water storage tank, a regenerated water storage tank, a first discharge pipe, a second discharge pipe, an acidic water outlet pipe, an alkaline water outlet pipe, a regenerated water outlet pipe and an iron online analyzer; the bottom of the resin tower is provided with a nickel sulfate feeding pipe, a pure water feeding pipe, an acid feeding pipe, an alkali feeding pipe and an air inlet pipe, wherein the nickel sulfate feeding pipe, the pure water feeding pipe, the acid feeding pipe and the alkali feeding pipe are respectively provided with a flow meter and a feeding valve, and the air inlet pipe is provided with an air inlet valve and an air inlet flow meter; the upper part of the resin tower is provided with a first discharge hole and a second discharge hole; the upper parts and the bottom parts of the nickel sulfate storage tank, the acidic water storage tank, the alkaline water storage tank and the regenerated water storage tank are respectively provided with a feeding hole and a discharging hole; a stirring device is arranged in the nickel sulfate storage tank, a sampling tube is arranged at the bottom of the nickel sulfate storage tank, and an automatic sampling valve and a sampling pump are arranged on the sampling tube; the iron on-line analyzer is connected with the sampling tube; the first discharge hole is connected with a feed inlet of the nickel sulfate storage tank through a first discharge pipe, and the first discharge pipe is provided with a first discharge valve and a first discharge pump; a second discharge valve is arranged on the second discharge pipe, one end of the second discharge pipe is connected with the second discharge port, and the other end of the second discharge pipe is respectively connected with the feed ports of the acidic water storage tank, the alkaline water storage tank and the regenerated water storage tank through an acidic water outlet pipe, an alkaline water outlet pipe and a regenerated water outlet pipe; the acidic water outlet pipe is provided with an acidic water outlet valve, an acidic water outlet pump and an acidic water pH meter; the alkaline water outlet pipe is provided with an alkaline water outlet valve, an alkaline water outlet pump and an alkaline water pH meter; a regenerated water outlet valve and a regenerated water outlet pump are arranged on the regenerated water outlet pipe.
Specifically, a nickel sulfate storage tank feed valve, an acidic water feed valve, an alkaline water feed valve and a regenerated water feed valve are respectively arranged at one end of the first discharge pipe, the acidic water outlet pipe, the alkaline water outlet pipe and the regenerated water outlet pipe, which is close to the feed inlets of the nickel sulfate storage tank, the acidic water storage tank, the alkaline water storage tank and the regenerated water storage tank.
Specifically, the ratio of the bed height to the bed diameter of the ion exchange resin in the resin tower is (3-4): 1.
Specifically, the nickel sulfate storage tank, the acidic water storage tank, the alkaline water storage tank and the regenerated water storage tank are all provided with liquid level meters.
Specifically, the liquid level meter is a flap liquid level meter.
A nickel sulfate solution iron removal system comprises a master control system, at least two branch control systems respectively connected with the master control system, and at least two nickel sulfate solution iron removal devices respectively connected with the branch control systems, wherein the master control system comprises a first computing system, a first receiving system and a first control system respectively connected with the first computing system, and the first receiving system is connected with an iron online analyzer of the nickel sulfate solution iron removal device; the sub-control system comprises a computing system, and a receiving system and a control system which are respectively connected with the computing system, wherein the receiving system is respectively connected with a first control system, a flow meter on a pure water feeding pipe, a flow meter on an acid feeding pipe, a flow meter on an alkali feeding pipe, an acidic water pH meter and an alkaline water pH meter; the control system is respectively connected with the first discharge valve, the second discharge valve, a feed valve on the nickel sulfate feed pipe, a feed valve on the pure water feed pipe, a feed valve on the acid feed pipe, a feed valve on the alkali feed pipe, an air inlet valve on the air inlet pipe, an acidic water outlet valve, an acidic water outlet pump, an alkaline water outlet valve, an alkaline water outlet pump, a regenerated water outlet valve and a regenerated water outlet pump.
The system comprises three sets of sub-control systems and nickel sulfate solution iron removal devices respectively connected with the three sets of sub-control systems, wherein the two sets of sub-control systems and the nickel sulfate solution iron removal devices connected with the two sets of sub-control systems are working systems, and the other set of sub-control system and the nickel sulfate solution iron removal device connected with the other set of sub-control system are standby systems.
The utility model has the advantages that:
(1) The utility model discloses a nickel sulfate solution deironing device comprises a resin tower and a plurality of liquid storage towers, wherein the resin tower is filled with ion exchange resin for deironing iron, compared with equipment of a precipitation method and an extraction method, the equipment has small floor area, low equipment operation and investment cost, stable treatment effect and less waste;
(2) The utility model discloses a nickel sulfate solution deironing system contains three sets of deironing devices, two-purpose one is equipped with, and the resin tower alternately operates, can switch the resin tower of work according to the iron content in the nickel sulfate of real-time detection, then carries out regeneration treatment to the resin tower that the deironing is saturated, can guarantee the effect of deironing when deironing in succession;
(3) The utility model discloses a nickel sulfate deironing method adopts ion exchange resin (amino phosphate group resin) to carry out the ion exchange deironing, and its principle lies in that the resin has the amino phosphate functional group of hydrogen type or sodium type, utilizes the amino phosphate chelating resin to have very strong affinity to certain cation, and is bigger than diacetate imine type chelating resin to the affinity of low atomic weight metal, can form more stable complex to polyvalent metal ion because the effect of complex number's ligand. Specifically, iron ions are attracted by amine ions and chelated by electron donation to phosphorus atoms;
for this embodiment, the overall process reaction equation for the resin is as follows:
when in work: 3RCH 2 NHCH 2 PO 3 Na 2 +2Fe 3+ →3(RCH 2 NHCH 2 PO 3 ) 2 Fe 3 +6Na +
During regeneration: 3 (RCH) 2 NHCH 2 PO 3 ) 2 Fe 3 +6HCl→3RCH 2 NHCH 2 PO 3 H 2 +2FeCl 3
During transformation: RCH 2 NHCH 2 PO 3 H 2 +2NaOH→RCH 2 NHCH 2 PO 3 Na 2 +2H 2 O
(4) The utility model discloses an adopt 8-10% hydrochloric acid to make resin regeneration in the method, and do not adopt other commonly used acids such as sulphuric acid, because show through a large amount of experiments, the anti-iron effect of sulphuric acid is far from the hydrochloric acid, use 2-3BV 8-10% hydrochloric acid to regenerate and can replace out with the iron of the overwhelming majority (≧ 90%) in the resin, but 6BV 30% sulphuric acid can't reach the same effect, sulphuric acid regeneration simultaneously, even if the transformation is the sodium type, the exchange capacity of resin also can greatly reduced, there is the difference of order of magnitude with the exchange capacity of the resin after hydrochloric acid regeneration. Chloride ions introduced by hydrochloric acid regeneration are easy to be washed off by pure water, and long-term detection shows that the chloride ions in the discharged nickel sulfate water are 10-40mg/L and reach the qualified standard.
Drawings
Fig. 1 is a schematic structural view of a nickel sulfate solution iron removing device disclosed by the utility model;
fig. 2 is a schematic diagram of the iron removal system for nickel sulfate solution disclosed in the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying fig. 1-2 and the detailed description. The embodiments shown below do not limit the scope of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to the attached drawing 1, a nickel sulfate solution iron removal device comprises a resin tower 1, a nickel sulfate storage tank 2, an acidic water storage tank 3, an alkaline water storage tank 4, a regenerated water storage tank 5, a first discharge pipe 6, a second discharge pipe 7, an acidic water outlet pipe 8, an alkaline water outlet pipe 9, a regenerated water outlet pipe 10 and an iron online analyzer (not shown in the drawing); the bottom of the resin tower 1 is provided with a nickel sulfate feeding pipe 11, a pure water feeding pipe 12, an acid feeding pipe 13, an alkali feeding pipe 14 and an air inlet pipe 15, the nickel sulfate feeding pipe 11, the pure water feeding pipe 12, the acid feeding pipe 13 and the alkali feeding pipe 14 are all provided with a flow meter and a feeding valve, and the air inlet pipe 15 is provided with an air inlet valve and an air inlet flow meter; a first discharge port and a second discharge port are arranged at the upper part of the resin tower 1; the upper parts and the bottoms of the nickel sulfate storage tank 2, the acidic water storage tank 3, the alkaline water storage tank 4 and the regenerated water storage tank 5 are respectively provided with a feed inlet and a discharge outlet; a stirring device is arranged in the nickel sulfate storage tank 2, a sampling pipe 16 is arranged at the bottom of the nickel sulfate storage tank 2, and an automatic sampling valve 17 and a sampling pump 18 are arranged on the sampling pipe 16; the iron on-line analyzer is connected with the sampling tube 16; the first discharge hole is connected with a feed hole of the nickel sulfate storage tank 2 through a first discharge pipe 6, and a first discharge valve 19 and a first discharge pump 20 are arranged on the first discharge pipe 6; a second discharge valve 21 is arranged on the second discharge pipe 7, one end of the second discharge pipe 7 is connected with a second discharge hole, and the other end of the second discharge pipe 7 is respectively connected with the feed inlets of the acidic water storage tank 3, the alkaline water storage tank 4 and the regenerated water storage tank 5 through an acidic water outlet pipe 8, an alkaline water outlet pipe 9 and a regenerated water outlet pipe 10; an acidic water outlet valve, an acidic water outlet pump 22 and an acidic water pH meter are sequentially arranged on the acidic water outlet pipe 8 from top to bottom along the liquid flowing direction; an alkaline water outlet valve, an alkaline water outlet pump 23 and an alkaline water pH meter are sequentially arranged on the alkaline water outlet pipe 9 from top to bottom along the liquid flowing direction; a regenerated water outlet valve and a regenerated water outlet pump 24 are sequentially arranged on the regenerated water outlet pipe 10 from top to bottom along the liquid flowing direction.
In an embodiment of the present invention, the first discharging pipe 6, the acidic water outlet pipe 8, the alkaline water outlet pipe 9 and the regenerated water outlet pipe 10 are respectively provided with a nickel sulfate storage tank feeding valve 25, an acidic water feeding valve 26, an alkaline water feeding valve 27 and a regenerated water feeding valve 28 at one end close to the feeding ports of the nickel sulfate storage tank 2, the acidic water storage tank 3, the alkaline water storage tank 4 and the regenerated water storage tank 5.
In one embodiment of the present invention, the ratio of the bed height to the bed diameter of the ion exchange resin in the resin column 1 is (3-4): 1, specifically 3: 1. 3.5: 1. or 4:1.
in an embodiment of the present invention, level meters are disposed on the nickel sulfate storage tank 2, the acidic water storage tank 3, the alkaline water storage tank 4, and the regenerated water storage tank 5, preferably, the liquid level meters are turned over.
A nickel sulfate solution iron removal system comprises a master control system, at least two branch control systems respectively connected with the master control system, and at least two nickel sulfate solution iron removal devices respectively connected with the branch control systems, wherein the master control system comprises a first computing system, a first receiving system and a first control system respectively connected with the first computing system, and the first receiving system is connected with an iron online analyzer of the nickel sulfate solution iron removal device; the branch control system comprises a computing system, and a receiving system and a control system which are respectively connected with the computing system, wherein the receiving system is respectively connected with a first control system, a flow meter on the pure water feeding pipe 12, a flow meter on the acid feeding pipe 13, a flow meter on the alkali feeding pipe 14, an acidic water pH meter and an alkaline water pH meter; the control system is respectively connected with a first discharge valve 19, a second discharge valve 21, a feed valve on the nickel sulfate feed pipe 11, a feed valve on the pure water feed pipe 12, a feed valve on the acid feed pipe 13, a feed valve on the alkali feed pipe 14, an air inlet valve on the air inlet pipe 15, an acidic water outlet valve, an acidic water outlet pump 22, an alkaline water outlet valve, an alkaline water outlet pump 23, a regenerated water outlet valve and a regenerated water outlet pump 24.
In an embodiment of the utility model, including three sets of branch control systems, and the nickel sulfate solution deironing device who is connected with three sets of branch control systems respectively, wherein two sets of branch control systems and the nickel sulfate solution deironing device who is connected with it are the operating system, and another set of branch control system and the nickel sulfate solution deironing device who is connected with it are spare system.
The utility model discloses a method for removing iron from nickel sulfate solution by using a nickel sulfate solution iron removal system, wherein at least one set of sub-control system and a nickel sulfate solution iron removal device connected with the sub-control system are standby systems, and the other systems are working systems; the master control system receives an iron concentration signal from the iron on-line analyzer of the working system, and when the iron concentration reaches a set value, the master control system controls the sub-control system in the standby system to start working, and the sub-control system further controls the nickel sulfate solution iron removal device corresponding to the sub-control system to perform iron removal operation.
Preferably, the resin column 1 is filled with D860 aminophosphonic acid ion exchange resin, the bed height of the ion exchange resin/bed diameter of the ion exchange resin being (3-4): 1, the ratio of the specific ion exchange resin bed height/ion exchange resin bed diameter may be 3: 1. 3.5: 1. or 4:1, the volume of an ion exchange resin bed layer is 1BV, and after the first filling in the resin bed is finished, the subsequent filling is carried out according to the abrasion condition every year, and the filling amount is about 10 to 15 percent every year. Reserving a reserved space of 0.2BV-0.4BV on the uppermost layer of the ion exchange resin bed layer; considering that the resin is in a hydrogen form when leaving a factory, the resin is converted into a sodium form after being regenerated, and the volume of the resin is expanded in the process of converting the hydrogen form into the sodium form, so a reserved space of 0.2BV-0.4BV needs to be reserved on the upper layer of a resin bed, and the specific reserved space can be 0.2BV, 0.3BV or 0.4BV; the set value of the iron concentration is 1.2mg/L to 1.4mg/L, and specifically may be 1.2mg/L, 1.25mg/L, 1.3mg/L, 1.35mg/L, or 1.4mg/L.
The iron removal operation specifically comprises the following steps:
(1) And (3) flushing: the branch control system controls to open a feed valve on the pure water feed pipe 12, an air inlet valve on the air inlet pipe 15 and a second discharge valve 21, simultaneously inputs pure water and air with the pressure of 0.15MPa-0.2MPa into the resin tower 1, carries out pressurized cleaning on the deironing resin, discharges washing water from a second discharge port, and the part of the washing water enters the nickel dissolving tower to be used as bottom water; when the sub-control system receives a signal that the pure water input quantity detected by the flow meter on the pure water feeding pipe 12 reaches 3BV-4BV, the sub-control system controls to close the feeding valve on the pure water feeding pipe 12, the air inlet valve on the air inlet pipe 15 and the second discharging valve 21, and the washing is finished; the pressure of the air may be 0.15MPa, 0.18MPa, 0.2MPa; the pure water input amount can be set to be 3BV, 3.5BV or 4BV;
(2) Iron removal: after the washing is finished, immediately controlling to open a feed valve, a first discharge valve 19 and a first discharge pump 20 on a nickel sulfate feed pipe 11 by a sub-control system, so that the nickel sulfate solution starts to feed from the bottom of the resin tower 1, the feeding rate is controlled to be 2BV/h-3BV/h, and the nickel sulfate after iron removal is discharged from a first discharge port and is conveyed to a nickel sulfate storage tank 2 through a first discharge pipe 6; the feeding rate can be 2BV/h, 2.5BV/h, 3BV/h, preferably 3BV/h;
(3) And (3) detecting the iron concentration: in the iron removal process, the automatic sampling valve 17 at the bottom of the nickel sulfate storage tank 2 is automatically opened every 30-60 min for sampling, specifically, sampling can be carried out once every 30min, 40min, 50min or 60min, and preferably sampling is carried out once every 60 min; the iron concentration in the sample is detected by an iron online analyzer connected with the sampling tube 16, and the detected iron concentration information is transmitted to a master control system by the iron online analyzer in real time; when the master control system receives a signal that the iron concentration in the nickel sulfate storage tank 2 reaches 1.2mg/L-1.4mg/L, a control signal is immediately sent to the corresponding branch control system, the branch control system controls a first feeding valve, a first discharging valve 19 and a first discharging pump 20 of a nickel sulfate solution iron removal device connected with the branch control system to be closed, iron removal is finished, the specific iron concentration can be set to be 1.2mg/L, 1.3mg/L or 1.4mg/L, preferably 1.4mg/L, the qualified standard of nickel sulfate is that the iron content is less than or equal to 1.5mg/L, the threshold value is set to be 1.2mg/L-1.4mg/L, a margin can be left for subsequent operation, and the condition that the iron content of products in the nickel sulfate storage tank exceeds the standard is prevented; after the equipment is in failure, manual sampling and inspection can be carried out through the sampling tube 16;
(4) Backwashing: after the iron removal is finished, immediately controlling to open a feed valve on the pure water feed pipe 12, an air inlet valve on the air inlet pipe 15, a second discharge valve 21, a regenerated water outlet valve and a regenerated water outlet pump 24 by the sub-control system, and simultaneously inputting pure water and air with the pressure of 0.15MPa-0.2MPa into the resin tower 1 for backwashing under pressure, wherein the pressure of the air can be 0.15MPa, 0.18MPa or 0.2MPa; controlling the feeding rate of the pure water to be 4BV/h-5BV/h, specifically 4BV/h, 4.5BV/h or 5BV/h; the backwashing water is discharged through a second discharge hole and enters the regenerated water storage tank 5 through a second discharge pipe 7 and a regenerated water outlet pipe 10, and the regenerated water in the regenerated water storage tank 5 can return to the front-end nickel dissolving tower to be used as bottom water; when the sub-control system receives a signal that the pure water feeding amount detected by the flow meter on the pure water feeding pipe 12 reaches 1BV-2BV, the sub-control system immediately controls and closes the feeding valve on the pure water feeding pipe 12, the air inlet valve on the air inlet pipe 15, the regenerated water outlet valve and the regenerated water outlet pump 24, and backwashing is finished; the total amount of feed of the specific pure water may be set to 1BV, 1.5BV, or 2BV; the purpose of this step is to wash out the nickel sulfate remaining on the surface of the resin;
(5) Regeneration: after backwashing is finished, immediately controlling to open a feed valve, an acid water outlet valve and an acid water outlet pump 22 on an acid feed pipe 13 by a sub-control system, inputting 8-10% hydrochloric acid solution into a resin tower 1, wherein the concentration of the hydrochloric acid can be 8%, 9% or 10%, the feeding speed of the hydrochloric acid is controlled to be 1BV/h-2BV/h, and the speed can be 1BV/h, 1.5BV/h or 2BV/h as much as possible, carrying out regeneration treatment on the resin in the resin tower 1, discharging the treated acid water through a second discharge hole, conveying the acid water to an acid water storage tank 3 through a second discharge pipe 7 and an acid water outlet pipe 8, and then, entering a wastewater workshop to neutralize with alkaline water; when the sub-control system receives a signal that the feeding amount of the hydrochloric acid solution detected by the flow meter on the acid feeding pipe 13 reaches 2BV-3BV, the sub-control system controls to close the feeding valve on the acid feeding pipe 13, the regeneration is finished, and the specific hydrochloric acid use amount can be set to 2BV, 2.5BV or 3BV; after the step is finished, fe ions in the resin are exchanged by hydrochloric acid, and the resin is converted into a hydrogen type, so that the ion exchange capacity is recovered;
(6) Quick and slow washing: after regeneration is finished, the sub-control system immediately controls to open a feed valve on the pure water feed pipe 12 and an air inlet valve on the air inlet pipe 15, firstly, pure water is controlled to perform pressure slow washing at the flow rate of 1BV/h-2BV/h, the specific pure water flow rate can be 1BV/h, 1.5BV/h or 2BV/h, when the sub-control system receives a signal that the pure water feed quantity transmitted by a flow meter on the pure water feed pipe 12 reaches 1BV-2BV, the pure water is immediately controlled to perform pressure fast washing at the speed of 4BV/h-5BV/h, specifically, the water consumption for slow washing can be set to 1BV, 1.5BV or 2BV, and the water flow rate for fast washing can be set to 4BV/h, 4.5BV/h or 5BV/h; the washing water of the fast and slow washing is discharged through a second discharge hole and is conveyed to the acidic water storage tank 3 through an acidic water outlet pipe 8, and the fast and slow washing water enters the storage tank and then returns to the front end nickel dissolving tower to be used as bottom water; when the sub-control system receives a signal that the pH value of the washing water detected by the pH meter of the acidic water is more than 2, the sub-control system immediately controls and closes the feed valve on the pure water feed pipe 12, the air inlet valve on the air inlet pipe 15, the acidic water outlet valve and the acidic water outlet pump 22, and the fast and slow washing is finished, so that the purpose of the step is to wash away residual acid;
(7) Liquid caustic soda transformation: after the fast and slow washing is finished, immediately controlling a feed valve, an alkaline water outlet valve and an alkaline water outlet pump 23 on an alkaline feed pipe 14 to open by a sub-control system, inputting 4-5% of liquid alkali into a resin tower 1, preferably, controlling the concentration to be 5%, controlling the flow rate of the liquid alkali to be 1BV/h-2BV/h, and carrying out liquid alkali transformation on the resin, wherein the flow rate of the liquid alkali can be 1BV/h, 1.5BV/h or 2BV/h, discharging the alkaline water through a second discharge hole, conveying the alkaline water to an alkaline water storage tank 4 through a second discharge pipe 7 and an alkaline water outlet pipe 9, and then returning the alkaline water to an alkaline water tank in an alkaline spray tower after the nickel dissolving tower for recycling; when the sub-control system receives a signal that the feeding amount of the liquid caustic soda from the flow meter on the caustic soda feeding pipe 14 reaches 2BV-3BV, the sub-control system controls to close a feeding valve on the caustic soda feeding pipe 14, the liquid caustic soda transformation is finished, and the specific using amount of the liquid caustic soda can be set to 2BV, 2.5BV or 3BV; the purpose of this step is to convert the hydrogen-type functional groups in the resin into sodium-type functional groups;
(8) Leaching: after the liquid alkali transformation is finished, immediately opening a feed valve on a pure water feed pipe 12 and an air inlet valve on an air inlet pipe 15 by a sub-control system, simultaneously inputting pure water with a feed rate of 4BV/h-5BV/h and air with a pressure of 0.15MPa-0.2MPa into a resin tower 1, leaching, wherein the flow rate of the pure water can be set to 4BV/h, 4.5BV/h or 5BV/h, and the air pressure can be 0.15MPa, 0.18MPa or 0.2MPa, discharging the leaching water through a second discharge hole, conveying the leaching water to an alkaline water storage tank 4 through a second discharge pipe 7 and an alkaline water outlet pipe 9, and then returning the leaching water to an alkaline liquid tank in an alkaline spray tower after the nickel dissolving tower for recycling; when the sub-control system receives a signal that the pH value of the alkaline water detected by the alkaline water pH meter is less than 11, the sub-control system immediately controls and closes the feed valve on the pure water feed pipe 12, the air inlet valve on the air inlet pipe 15, the second discharge valve 21, the alkaline water outlet valve and the alkaline water outlet pump 23 which are connected with the sub-control system, and the purpose of the step is to wash off residual alkali after leaching.
The utility model discloses an among the nickel sulfate deironing system, the total control system receives through first receiving system and comes from the iron concentration signal of the online analyzer of iron that is working after, with signal transmission to first computing system, first computing system calculates and contrasts real-time iron concentration signal and the iron concentration value of settlement, when calculating out real-time iron concentration signal more than or equal to the setting value, send the calculation signal to first control system immediately, first control system sends control signal to the receiving system of the branch control system that corresponds according to the calculation signal; the sub-control system receives signals from the first control system, each flowmeter and the pH meter which are connected with the sub-control system through the receiving system, then the signals are transmitted to the computing system, the computing system obtains computing information through computing, the computing information is transmitted to the control system, and the control system sends control signals to each pump or valve which is connected with the control system according to the computing information, so that continuous operation and automatic control of the whole process are achieved. In addition, the system comprises three sets of branch control systems and iron removal devices which are connected with a master control system, the branch control systems are connected with the iron removal devices in a one-to-one correspondence mode, the iron removal devices are used for one purpose and one spare purpose, when the iron concentration in a nickel sulfate storage tank 2 of the running iron removal device reaches a set value, the master control system controls the iron removal devices to enter resin backwashing regeneration and other processes through the corresponding branch control systems, meanwhile, the master control system controls the spare iron removal systems to enter an iron removal program through the spare branch control systems, and the processes are circulated, so that uninterrupted iron removal operation is realized.
Example 1
Dissolve each component concentration in the nickel sulfate of nickel gain as shown in table 1, adopt the utility model discloses a device and method carry out the deironing to this nickel sulfate solution, and gained deironing data is as shown in table 2.
TABLE 1 concentration of each component in nickel sulfate obtained by nickel dissolution
| Detecting items | Unit of | Detection standard | The result of the detection |
| Ni | g/L | ≥125 | 125.16 |
| Cu | g/L | ≤0.0010 | N.D |
| Fe | g/L | ≤0.0015 | 0.014 (exceeding standard) |
| Ca | g/L | ≤0.0050 | 0.0012 |
| Mg | g/L | ≤0.0050 | 0.00018 |
| Pb | g/L | ≤0.0035 | 0.0032 |
| Zn | g/L | ≤0.0010 | 0.00016 |
| Cd | g/L | ≤0.0025 | N.D |
| Cr | g/L | ≤0.0020 | 0.00083 |
| Li | g/L | ≤0.0020 | N.D |
| Si | g/L | ≤0.0050 | N.D |
| Al | g/L | ≤0.0010 | N.D |
| P | g/L | ≤0.0100 | 0.008 |
| TOC | ppm | ≤40 | 4.26 |
TABLE 2 iron removal data for sodium D860 resins
Example 2
Dissolve nickel and get each component concentration in the nickel sulfate as shown in table 3, adopt the utility model discloses a device and method carry out the deironing to this nickel sulfate solution, and obtained deironing data is shown in table 4.
TABLE 3 concentration of each component in nickel sulfate by nickel dissolution
| Detecting items | Unit of | Detection standard | The result of the detection |
| Ni | g/L | ≥125 | 134.61 |
| Cu | g/L | ≤0.0010 | N.D |
| Fe | g/L | ≤0.0015 | 0.026 (exceeding standard) |
| Ca | g/L | ≤0.0050 | 0.0024 |
| Mg | g/L | ≤0.0050 | 0.00042 |
| Pb | g/L | ≤0.0035 | 0.00054 |
| Zn | g/L | ≤0.0010 | 0.00044 |
| Cd | g/L | ≤0.0025 | N.D |
| Cr | g/L | ≤0.0020 | 0.00083 |
| Li | g/L | ≤0.0020 | 0.00044 |
| Si | g/L | ≤0.0050 | 0.00036 |
| Al | g/L | ≤0.0010 | N.D |
| P | g/L | ≤0.0100 | 0.0006 |
| TOC | ppm | ≤40 | 11.34 |
TABLE 4 iron removal data for sodium D860 resin
It can be seen from the data in tables 1 and 3 that Fe in the nickel sulfate raw material solution obtained by dissolving nickel is between 10-30mg/L, and basically exceeds standard, except that iron exceeds standard, all other elements do not exceed standard, therefore, only need use the utility model discloses a device and method adopt resin deironing can. It should be additionally noted that, hydrogen peroxide is added into the feed liquid obtained by dissolving ores in an acidic environment, fenton reaction occurs, and ferrous iron is oxidized into ferric iron, so that the ferric iron is removed finally in the utility model.
As seen from tables 1 and 2, a single resin column can sustain about 40-50h without penetration, and the flow rate is about 3BV/h, namely one resin column can process feed liquid 120-150 times of the volume of the resin, the processing effect is excellent, and no obvious performance attenuation phenomenon of the resin is found after more than half a year of uninterrupted test. In the apparatus and method disclosed in the present invention, hydrogen-type resin can be used, but the hydrogen-type resin has a much smaller exchange capacity than sodium-type resin, and therefore, it is preferable to use the resin converted into sodium-type resin. Under the condition of using hydrogen type resin, the content of iron in nickel sulfate exceeds the standard after 10 hours, and under the condition of using sodium type resin, the resin can persist for 30 hours, but the content of iron in nickel sulfate does not exceed the standard.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A nickel sulfate solution deironing device is characterized by comprising a resin tower, a nickel sulfate storage tank, an acidic water storage tank, an alkaline water storage tank, a regenerated water storage tank, a first discharge pipe, a second discharge pipe, an acidic water outlet pipe, an alkaline water outlet pipe, a regenerated water outlet pipe and an iron online analyzer; the bottom of the resin tower is provided with a nickel sulfate feeding pipe, a pure water feeding pipe, an acid feeding pipe, an alkali feeding pipe and an air inlet pipe, the nickel sulfate feeding pipe, the pure water feeding pipe, the acid feeding pipe and the alkali feeding pipe are all provided with a flow meter and a feeding valve, and the air inlet pipe is provided with an air inlet valve and an air inlet flow meter; the upper part of the resin tower is provided with a first discharge hole and a second discharge hole; the upper parts and the bottom parts of the nickel sulfate storage tank, the acidic water storage tank, the alkaline water storage tank and the regenerated water storage tank are respectively provided with a feeding hole and a discharging hole; a stirring device is arranged in the nickel sulfate storage tank, a sampling pipe is arranged at the bottom of the nickel sulfate storage tank, and an automatic sampling valve and a sampling pump are arranged on the sampling pipe; the iron on-line analyzer is connected with the sampling tube; the first discharge hole is connected with a feed inlet of the nickel sulfate storage tank through a first discharge pipe, and a first discharge valve and a first discharge pump are arranged on the first discharge pipe; a second discharge valve is arranged on the second discharge pipe, one end of the second discharge pipe is connected with the second discharge port, and the other end of the second discharge pipe is respectively connected with the feed ports of the acidic water storage tank, the alkaline water storage tank and the regenerated water storage tank through an acidic water outlet pipe, an alkaline water outlet pipe and a regenerated water outlet pipe; the acidic water outlet pipe is provided with an acidic water outlet valve, an acidic water outlet pump and an acidic water pH meter; the alkaline water outlet pipe is provided with an alkaline water outlet valve, an alkaline water outlet pump and an alkaline water pH meter; a regenerated water outlet valve and a regenerated water outlet pump are arranged on the regenerated water outlet pipe.
2. The deironing device of claim 1, wherein a nickel sulfate storage tank feed valve, an acidic water feed valve, an alkaline water feed valve and a regenerated water feed valve are respectively arranged at one end of each of the first discharge pipe, the acidic water outlet pipe, the alkaline water outlet pipe and the regenerated water outlet pipe, which is close to the feed inlets of the nickel sulfate storage tank, the acidic water storage tank, the alkaline water storage tank and the regenerated water storage tank.
3. The apparatus for removing iron from nickel sulfate solution as claimed in claim 1, wherein the ratio of the bed height to the bed diameter of the ion exchange resin in the resin tower is (3-4): 1.
4. The apparatus of claim 1, wherein the nickel sulfate storage tank, the acidic water storage tank, the alkaline water storage tank and the regenerated water storage tank are all provided with level gauges.
5. The iron removal device for the nickel sulfate solution as claimed in claim 4, wherein the liquid level meter is a flap liquid level meter.
6. A nickel sulfate solution iron removal system comprising the nickel sulfate solution iron removal device of claim 1, which is characterized by comprising a master control system, at least two branch control systems respectively connected with the master control system, and at least two nickel sulfate solution iron removal devices respectively connected with the branch control systems, wherein the master control system comprises a first computing system, and a first receiving system and a first control system respectively connected with the first computing system, and the first receiving system is connected with an iron online analyzer of the nickel sulfate solution iron removal device; the sub-control system comprises a computing system, and a receiving system and a control system which are respectively connected with the computing system, wherein the receiving system is respectively connected with a first control system, a flow meter on a pure water feeding pipe, a flow meter on an acid feeding pipe, a flow meter on an alkali feeding pipe, an acidic water pH meter and an alkaline water pH meter; the control system is respectively connected with the first discharge valve, the second discharge valve, a feed valve on the nickel sulfate feed pipe, a feed valve on the pure water feed pipe, a feed valve on the acid feed pipe, a feed valve on the alkali feed pipe, an air inlet valve on the air inlet pipe, an acidic water outlet valve, an acidic water outlet pump, an alkaline water outlet valve, an alkaline water outlet pump, a regenerated water outlet valve and a regenerated water outlet pump.
7. The nickel sulfate solution iron removal system as claimed in claim 6, comprising three sets of sub-control systems and nickel sulfate solution iron removal devices respectively connected with the three sets of sub-control systems, wherein the two sets of sub-control systems and the nickel sulfate solution iron removal devices connected therewith are working systems, and the other set of sub-control system and the nickel sulfate solution iron removal device connected therewith are standby systems.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115069311A (en) * | 2022-06-22 | 2022-09-20 | 格林美（江苏）钴业股份有限公司 | Iron removal device, iron removal system and iron removal method for nickel sulfate solution |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115069311A (en) * | 2022-06-22 | 2022-09-20 | 格林美（江苏）钴业股份有限公司 | Iron removal device, iron removal system and iron removal method for nickel sulfate solution |
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